Is there a command that i can issue in Ubuntu to see explicitly if my ethernet controller supports gigabit ethernet?
3 Answers
As root, run ethtool eth0
if eth0 is the NIC in question. You'll get an output like:
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Current message level: 0x000000ff (255)
Link detected: yes
Should be all the info you need.
lspci
should show it like "blah blah Gigabit 10/100/1000 blah blah controller". Like that. :)
lspci | grep Ethernet
This should show information about your Ethernet controller and it should tell you your connection is 10G, 1G or other. You can also google the name of the ethernet controller for more information.